Method of valve construction



H. P. KRAFT.

' METHOD OF VALVE CONSTRUCTION.

APPLICATION FILED mum. I918.

1,403,965. I Patented Jan. 17; 1922.

' i691 Fly/2. 1 5. 12 4. E 5. 12 22 INVENTOR WITNESS: 167% 13 I y o y 'very large proportion of the blank.

HENRY PHILLIP KRAFT, 0F RIDGEWOOD, JERSEY.

METHOD 0F VALVE CONSTRUCTION.

Application filedApriI 18, 1918.

T 0 all #071 am it may comer 1i:

Be it. known that I, HENRY PHILLIP Knarr, a citizenof the United States of rnnerica, residing in Ridgewood, in the county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Methods of Valve Construction, of which the following is a specification.

In the construction of certain classes of pneumatic tine valves, there is employed an integral valve member having a port therein which permits passage of air and is covered by an elastic, flexible sleeve which constitutes the valve. Such devices areusually constructed with oppositely disposed lugs or projecting portions to co-operate with corresponding guideways in the valve casing or housing. Such'devices have been made from what is known as lug rod, consisting of a rod blank with continuous ribs or shoulders at opposite points which are cut away to afford the short lugs of the finished article. This is an extremely expensive process, as it involves cutting away and wasting a The finished lug occupies only about one-sixth or less of the length of the blank, so that an amount of metal equivalent to about five times the volume of each lug is cut away in forming the same.

It is my purpose to eliminate this waste and to form the lugs by certain pressing operations, doing away entirely with the necessity of shoulders or flanges on the original blank. One method of procedure is to start with a cylindrical rod blank and by applying pressure or dies thereto, forming an annular enlargement. By subsequent pressing operations this enlarged annular portion is increased in size and its proportions modified until it approximates the general dimensions of the desired lug. The blank is then turned to impart the proper final shape to the lug.

To these and other ends the invention consists in certain improvements and combinations of parts as will be hereinafter more fully described and pointed out in the claims at the end of the specification.

Figure l is a view in elevation of the cylindrical blank;

Fig. 2 is a view in elevation showing the siecification of Letters Patent.

Serial No. 229,266.

initial operation of forming the annular enlargement on the blank;

Fig. 3 is a similar view showing the next operation of shaping the enlargement into opposed lugs;

Fig. 4 is a similar view'illustrating the form of the lugs after the next operation;

Fig. 5 is a view illustrating the final operation on the lugs Fig. 6 is a similar view illustrating the blank after a further oiperation;v

Fig. 7 is a similar view showing the blank with the. hollow extension attached;

Fig. 8 is a side elevation of the vcompleted article; I

Fig. 9 is a crosssectional view on line 99 of Fig. 2;

Fig. 10 is a similar view on line 1010 of Fig. 3;

Fig. 11 is a cross-sectional view on line l1-11 of Fig. 4, and P Fig. 12 is a similar view on line 1212 of The methodis intended to. produce a device suchas shown in Fig. 8, which COID- prises a hollow body A having a tubular extension a with a port 5. The tubular extension a fits within a suitable valve casing or housing, the port 6 being covered by asurrounding rubber sleeve which acts as a Valve to permit air to pass in one direction. 0 designates lugs on opposite sides of the valve member or body and these are adapted to engage guideways or slots in the housing, while the bent end 61 is threaded to receive an inflating connection.

Heretofore such a device has been constructed by taking a blank having shoulders or flanges extending from one end to another, and cutting away the flanges except at the portion which forms the lugs 0. According to my present method, I start with a cylindrical blank B and first subject it to pressure from dies or otherwise to form an enlarged annular portion c. This is attained by swaging the blank lengthwise at opposite sides of the enlarged portion, or compressing it toward the latter. The blank is next subjected to a further pressing operation whereby the annular enlargement e is formed into opposite lugs or extensions 7 which initially do not project very far from the body of the blank and are comparatively thick. Pres- Patented Jan. 17,1922.

sure is then applied to the lugs f until they assume the form shown in Fig. 4:, in which they are somewhat thinner and of greater extent laterally. The blank is then turned, cutting away the surplus portions of the lugs f until the required finished shape is obtained, as shown in Fig. 5- At the same time the end of the blank 9 is cut away to give it the required taper and the annular oove k is formed between the end portion and the lugs f. The blank is then threaded, as shown at d, and is drilled interiorly to provide a continuous opening j. The hollow extension tr is then driven into the tapered end of the blank, as shown in Fig. 7, and the device is complete, except for the bending operation to give it the form illustrated in Fig. 8, although this particular form is not essential and constitutes no part of the invention. y i

The invention affords an economical and simple method of producing an article such as described. The saving efiected is very considerable and the resulting product is equally, if not more, efiicient for all practical purposes then valves constructed according to the old method. The invention is not confined to the particular disclosure set forth, as I may modify the procedure without departing from the essential features of the improvement or the scope of the followin claims. at I claim is r 1. The method of constructing a valve member having oppositely disposed integral lugs, comprising swaging an enlargement upon a rod, die-pressing said enlarged portion-of said rod to form lugs of the proper thickness, and turning said rod to cut the peripheral portions of said lugs to the proper shape.

2. The method of constructing a valve member having oppositely disposed integral lugs, comprising swaging an enlargement upon a rod, die-pressing said enlarged portion of said rod to form lugs of the rough dimension of the final thickness of the lug, further die-pressing said enlarged portion of the rod to reduce the lugs to the proper thickness and face form, and turning said rod to cut the peripheral portions of said lugs to the proper shape.

3. The method of constructing a valve member having oppositely disposed integral lugs, comprising swaging an enlargement simultaneously tapering the lugged end of said rod, drilling said tapered end, andfixing one end of a hollow tube in said drilled hole. a

my name.

HENRY PHILLIP KRAFT.

In witness whereof, I have hereunto signed 

